My autism with this fetish knows no bounds.
You wake up, having no idea where you are. Your body is encased, and placed vertically from what you can tell - back arched, butt sticking out, legs forced to spread at the very least a right angle, arms held to the side, head secured by some kind of strap or case preventing you from moving it side-to-side. Darkness encases your vision, and while there's nothing covering your ears, it's impossible to know if there's something you should be hearing out there. Your only perception of the world is what you can feel, and what you can feel is a thick diaper wrapped around your waist and a hundred sore spots up and down your back, thighs arms, etc, likely from countless IVs coursing into you. The air tastes funny, almost like that feeling when you accidentally breathe in some air-particle solution, yet you don't try to cough it out. Almost the most menacing of all is the ring gag, keeping your lips spread wide and assuredly linked to some sort of tube. You might reject the food that comes down it, but luckily, the IVs won't let you waste away.
All of the sudden, your vision is one of a hundred colors and patterns at once, yet none of them seem to make any sense. Your ears are assaulted with ten different conversations playing right into your mind, brain unable to attempt to keep track of them. Naturally, you're going to try to close your eyes, and shut it out, but sooner or later, maybe some days pass, you're going to open them, you're going to listen to your only source of simulation in this world. A few minutes of this full treatment cause your brain to stop trying to keep up, stop trying to fight, and suddenly, you're the most relaxed you've ever been in your life, all your muscles perfectly calm, as the machine you're tied to simply continues playing its 'movie' in ways that continue to confound you. In this way, some time passes. You end up being ushered to a sweet chemically-induced sleep several times in this process, hearing the voices in your dreams.
Dreams that are increasingly becoming not your own. Maybe it's just a fascination with your diaper that starts playing within them. Maybe your dreams are of getting off, of some hot thing rubbing you through your garment and squirting your padding something silly. Maybe you're fearful of the fact that you haven't had to use them yet, and dread when it comes, playing the scenario over and over again in your dreams. A few artificial nights come like this, every dream centering around your diaper, using it, enjoying it, being trapped in it - before in one of them, inevitably due to all the water pumped into you, you feel warmth spreading around your hips, followed by a shiver up your spine and some fireworks going off inside your head, enough that causes you to audibly moan to whoever might be listening. The simple act of wetting yourself triggered, likely by injection, such a dopamine rush that it wakes you up panting and dealing with the cold clamminess around your hips that refuses to ever go away.
More time passes, your days filled with dazing against this screen and refusing to eat from your feeding tube, your nights filled with dreams of accidental orgasms that have your toes curling even into your 'afternoon' in delight simply remembering them. The big night comes, and suddenly, worryingly, the dream isn't about an ache in your hips. It's about a rumbling in your tummy, and you can't wake up from it. Perhaps at this point you're not even sure if there is a difference between being awake and asleep anymore, because the world is filled with the same shifting scenery in both of them. The simple gnawing ache at your backside has you worked up and biting your lip, yet the trained disgust to what you know lies down the road has you cursing audibly, straining against your bondage, and filled with an utter revulsion towards the fact that your animal-brain is looking forward to it. You fight with yourself for as long as your body will allow, before finally shame peeks its head out from under and your diaper is drooping, the wet frontside strained up against your from the weight of what you did. And as it happens, as your body gives in, as your diaper starts to sag, your whole person lights up with bliss, muscles straining, eyes zoning out, head completely emptying itself to make up for the sheer rush of pink that just consumed you as what must be ten orgasms in one washes over… And when it's all over, you're left breathless, satisfied, spent, and with a delightful heat cupping your butt.